炉是一种用来取暖或加热物体的常见家用或工业用设备。炉通常使用燃料（火炉）、电力（电弧炉、感应炉）来加热。

家用炉主要用于加热炉子中所盛物体，如空气、蒸汽或水。目前普遍使用的用于加热的燃料有天然气、燃料油、煤以及木材等；电力也常常用于炉子的加热，特别是在电力价格相对较低的地区。

• 瓦斯炉，使用液化天然气（LNG）或液化石油气（LPG）作为燃料
• 卡式炉，使用罐装瓦斯作为燃料，野外露营时常见
• 电磁炉

A furnace is a device used for high-temperature heating. The name derives from Greek word fornax, which means oven.

In American English and Canadian English usage, the term furnace on its own refers to the household heating systems based on a central furnace (known either as a boiler, or a heater in British English), and sometimes as a synonym for kiln, a device used in the production of ceramics. In British English, a furnace is an industrial furnace used for many things, such as the extraction of metal from ore (smelting) or in oil refineries and other chemical plants, for example as the heat source for fractional distillation columns.